You can change the number of decimals your trading journal shows for price inputs by changing the selection in your dropdown menu under:
Settings > General
Stocks = 2/3 decimals
Forex / Spreadbetting = 5 decimals
Futures / CFD = 6 decimals
Crypto = 8 decimals
Important: Nothing else changes besides the decimal count. For example, if you trade Futures but want to only show 2 decimals, you can simply choose Stocks in the dropdown. Nothing else changes besides the decimal number.